Podcast
Questions and Answers
What occurs during dynamic equilibrium in a reversible reaction?
What occurs during dynamic equilibrium in a reversible reaction?
In which direction does the equilibrium shift when the temperature is increased for an exothermic reaction?
In which direction does the equilibrium shift when the temperature is increased for an exothermic reaction?
What does the position of equilibrium indicate?
What does the position of equilibrium indicate?
What principle can be used to predict how changes in external conditions affect equilibrium?
What principle can be used to predict how changes in external conditions affect equilibrium?
Signup and view all the answers
What would likely happen to the yield of ammonia if the temperature is decreased?
What would likely happen to the yield of ammonia if the temperature is decreased?
Signup and view all the answers
If a reaction is described as shifting 'towards the left', what does this imply?
If a reaction is described as shifting 'towards the left', what does this imply?
Signup and view all the answers
What happens to the equilibrium position if external pressure is increased?
What happens to the equilibrium position if external pressure is increased?
Signup and view all the answers
Which of the following statements is true regarding an endothermic reaction and temperature changes?
Which of the following statements is true regarding an endothermic reaction and temperature changes?
Signup and view all the answers
What is the effect of increasing temperature on the yield of ammonia in an exothermic reaction?
What is the effect of increasing temperature on the yield of ammonia in an exothermic reaction?
Signup and view all the answers
How does increasing pressure affect the equilibrium of the reaction CO(g) + 2H2(g) ⇌ CH3OH(g)?
How does increasing pressure affect the equilibrium of the reaction CO(g) + 2H2(g) ⇌ CH3OH(g)?
Signup and view all the answers
What is the effect of decreasing pressure on a reaction with more moles of gas on the reactants' side?
What is the effect of decreasing pressure on a reaction with more moles of gas on the reactants' side?
Signup and view all the answers
What temperature conditions typically yield both a reasonable yield and reaction rate?
What temperature conditions typically yield both a reasonable yield and reaction rate?
Signup and view all the answers
What happens to the equilibrium if the concentration of OH- ions is increased?
What happens to the equilibrium if the concentration of OH- ions is increased?
Signup and view all the answers
Why is high pressure costly and often avoided in industrial processes?
Why is high pressure costly and often avoided in industrial processes?
Signup and view all the answers
In a reaction where the number of moles of gas on both sides is identical, what is the effect of changing pressure?
In a reaction where the number of moles of gas on both sides is identical, what is the effect of changing pressure?
Signup and view all the answers
What does a high temperature do to an exothermic reaction's equilibrium?
What does a high temperature do to an exothermic reaction's equilibrium?
Signup and view all the answers
What happens to the position of equilibrium when H+ ions are added?
What happens to the position of equilibrium when H+ ions are added?
Signup and view all the answers
What is the role of a catalyst in a chemical equilibrium?
What is the role of a catalyst in a chemical equilibrium?
Signup and view all the answers
Which of the following pairs indicates the correct conditions for the Haber process?
Which of the following pairs indicates the correct conditions for the Haber process?
Signup and view all the answers
In the hydration of ethene to produce ethanol, what are the optimal conditions?
In the hydration of ethene to produce ethanol, what are the optimal conditions?
Signup and view all the answers
Why is high pressure used in the Contact process?
Why is high pressure used in the Contact process?
Signup and view all the answers
What is the major consequence of using too high a pressure in industrial processes?
What is the major consequence of using too high a pressure in industrial processes?
Signup and view all the answers
What effect does lowering the temperature have on the yield in exothermic reactions?
What effect does lowering the temperature have on the yield in exothermic reactions?
Signup and view all the answers
In terms of the equilibrium shift for the reaction producing SO2 in the Contact process, what does the addition of O2 do?
In terms of the equilibrium shift for the reaction producing SO2 in the Contact process, what does the addition of O2 do?
Signup and view all the answers
What is the effect of catalysts on the rate of reaction and equilibrium?
What is the effect of catalysts on the rate of reaction and equilibrium?
Signup and view all the answers
Which statement correctly summarizes the impact of high pressure in chemical reactions?
Which statement correctly summarizes the impact of high pressure in chemical reactions?
Signup and view all the answers
What effect does recycling unreacted reactants have on the overall yield of a chemical process?
What effect does recycling unreacted reactants have on the overall yield of a chemical process?
Signup and view all the answers
When calculating the equilibrium constant Kc, which components are excluded from heterogeneous Kc expressions?
When calculating the equilibrium constant Kc, which components are excluded from heterogeneous Kc expressions?
Signup and view all the answers
For the equilibrium reaction H2(g) + Cl2(g) ⇌ 2HCl(g), if the concentrations at equilibrium are 0.67 mol dm-3 for H2 and 0.83 mol dm-3 for Cl2, what is the Kc expression for this reaction?
For the equilibrium reaction H2(g) + Cl2(g) ⇌ 2HCl(g), if the concentrations at equilibrium are 0.67 mol dm-3 for H2 and 0.83 mol dm-3 for Cl2, what is the Kc expression for this reaction?
Signup and view all the answers
Which parameter, if too high, could lead to excessive energy costs in a chemical process involving high pressure?
Which parameter, if too high, could lead to excessive energy costs in a chemical process involving high pressure?
Signup and view all the answers
In which scenario would using low temperature be beneficial, despite the slow reaction rate?
In which scenario would using low temperature be beneficial, despite the slow reaction rate?
Signup and view all the answers
What is the significance of stoichiometric balancing in the Kc expression?
What is the significance of stoichiometric balancing in the Kc expression?
Signup and view all the answers
Study Notes
Chemical Equilibrium
- Chemical reactions can be reversible and reach a dynamic equilibrium where the forward and backward reactions occur at equal rates.
- The concentrations of reactants and products remain constant in dynamic equilibrium.
- The position of equilibrium describes the composition of the equilibrium mixture.
- Favoring reactants means the mixture contains mostly reactants.
Le Chatelier's Principle
- Le Chatelier's principle predicts how changing conditions affect equilibrium.
- If a change is made to a system at equilibrium, the system will shift to counteract that change.
Temperature Effects
- Increasing temperature shifts the equilibrium toward the endothermic direction to absorb the heat. This reduces the system's temperature.
- Decreasing temperature shifts the equilibrium toward the exothermic direction to release heat, increasing the system's temperature.
Pressure Effects
- Increasing pressure shifts the equilibrium to the side with fewer moles of gas. This reduces the pressure.
- Decreasing pressure shifts the equilibrium to the side with more moles of gas. This increases the pressure.
- If the number of moles of gas is the same on both sides, pressure changes have no effect.
Concentration Effects
- Increasing the concentration of a reactant shifts the equilibrium to the right to consume the added reactant.
- Increasing the concentration of a product shifts the equilibrium to the left to decrease the product concentration.
Catalyst Effects
- Catalysts speed up both the forward and backward reactions equally, not shifting the equilibrium.
Equilibrium Constant (K)
- K is a numerical value representing the equilibrium position.
- K is calculated from the equilibrium concentrations of products and reactants, raised to their stoichiometric powers.
- K only changes with temperature.
- A larger K value indicates a greater product concentration at equilibrium.
- K values are unitless for homogeneous systems.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
Explore the fascinating concepts of chemical equilibrium, including reversible reactions and dynamic equilibrium. This quiz delves into Le Chatelier's principle and how changes in temperature and pressure affect equilibrium conditions. Test your understanding of these fundamental principles in chemistry.